(-)(rel 3R,3S)-4-methyl-3-phenyl-1H-spiro[benzo[e][1,4]diazepin-3,2-oxirane]-2,5-dione 19553-26-5 CAS 19553-26-5
| CAS No. | 19553-26-5 |
| Molecular Formula | C17H14N2O3 |
| Molecular Weight | 294.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
(-)(rel 3R,3S)-4-methyl-3-phenyl-1H-spiro[benzo[e][1,4]diazepin-3,2-oxirane]-2,5-dione 19553-26-5 (CAS 19553-26-5) is a high-purity analytical reference standard with the molecular formula C17H14N2O3 and a molecular weight of 294.30 g/mol.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, (-)(rel 3R,3S)-4-methyl-3-phenyl-1H-spiro[benzo[e][1,4]diazepin-3,2-oxirane]-2,5-dione 19553-26-5 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 294.30 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C17H14N2O3 |
| Molecular Weight | 294.30 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
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